400 
[February 
1. C. rufitarsus, Smith. 
Coelioxys rufitarsus, Smith, Brit. Mus. Cat. ii, p. 271, % (1854.) 
'‘’■Male. Length 5i*lines.—Black, the head and thorax coarsely 
punctured, the face covered with white pubescence, the cheeks and the 
thorax beneath have a long white pubescence as well as the sides of 
the metathorax, the tegulge testaceous in the middle, the wings subhy¬ 
aline, their nervures ferruginous, all the tarsi bright ferruginous; the 
apical margins of all the segments have a white marginal fascia) the 
fifth segment has on its apical margin laterally a short blunt tooth, the 
sixth has a more acute one on each side in the middle, the apex hav¬ 
ing four teeth, placed two above and two beneath, the latter being the 
longest and most acute. 
'■'■Hah .—United States.’’ 
Not seen. C. diibitata Smith, is most probably the female of this 
species. 
2. C. dubitata. Smith. 
Coelioxys duhitata, Smith, Brit. Mus. Cat. ii, p. 272, 9* (1854.) 
Female .—Head black, clothed with yellowish-white pubescence, 
which is longer about the insertion of the antennae and on the apex of 
the clypeus; vertex deeply and roughly punctured. Antennae black. 
Thorax black, deeply, roughly and rather densely punctured ; an obso¬ 
lete line on the anterior margin, interrupted in the middle, a line over 
the tegulae and a spot behind them, two spots in front of the scutellum 
and an obsolete line behind it, a double line on each side of the pleura 
continued uninterrupted beneath, of short white pubescence; sides of 
the metathorax densely clothed with white pubescence; tegulae black; 
scutellum with a stout, bent tooth on each side behind. Wings sub¬ 
hyaline, dusky towards the tip; nervures fuscous. Legs black, tip of 
the femora and the tarsi rufous; the femora and tibiae clothed with 
short white pubescence. Abdomen conical, black, shining, distinctly 
and sparsely punctured; the five basal segments with an apical white 
marginal fringe; the superior plate of the apical segment finely and 
densely punctured and having a slight longitudinal carina towards the 
tip; on each side of the segment the margin is suddenly narrowed at 
half its length, forming on each side a sharp angle, from which it 
gradually narrows to the tip which is obtuse and rounded; the inferior ' 
plate is lanceolate, longer than the superior and very slightly notched 
on each side near the tip ; ventral segments densely and deeply punc- 
